Please appease me
When using the auto headlamps, when it is daylight out, they are not supposed to come on, correct, this is the HID's and the taillights.
Also just the DRL's are supposed to be on during the day.
I noticed mine coming on during the day and the navi changing to night mode, along with the dash lights.
I've never really paid attention to it before, plus my wife who uses the Jeep, never noticed it.
Also where is the sensor located for the auto headlamps?

Correct the DRL are the only thing supposed to be on when running Auto mode on the headlights during the daytime. The sensor I believe is in the middle of the dash looks like a little dome near the bottom of the windshield.

Sometimes going through a tunnel, building shadow, tree shadow, etc will set off the auto lights on a cloudy overcast day. But I agree the dash lights and media center adjusting is hard on the eyes, particularly if you are wearing sunglasses.

The sensor can be a bit touchy, which I actually prefer to my last SUV that took 10-15 seconds to turn the auto headlamps on in tunnels, parking garages, etc.

You can over-ride the dash and media center lights by adjusting the rotating "wheel" next to the headlight knob to the 2nd "click". This will leave your dash and media lights/backlight on "day" mode all the time - which I actually prefer.

Also, in your Media Center NAV options (if you have NAV), you can set the day/night graphics feature to day, night or auto. Personally, I dislike the very dark night graphics.

You can also place something over the sensor "bulb" in the center of the dash (paper, gloves, tape, etc) if you want the headlights to stay on all the time when the car is running - and auto turn off/on with the engine. Best luck.

I believe you can control the brightness of the NAV screen independently of the dash lights (at least on the RHR radio). Go to Main Menu, then press Options, then Display in the upper right corner. You can choose Day, Night, or Auto, as justal13 stated, and adjust the brightness in each mode, separate from the dashboard display.